The Pokémon GO Halloween 2017 event is taking place from on October 20 at 12:00 P.M. PDT and runs until November 2 at 1:00 P.M. PDT. features select Generation I, II and III GHOST Pokémon.
In addition, trainers will earn extra Candy Rewards and Buddy Pokémon will earn candy 2x as fast. Includes Super Incubator and Raid Pass sale.
Official Press release
SAN FRANCISCO—OCTOBER 19, 2017—Niantic, Inc., and The Pokémon Company International today announced an upcoming Halloween celebration in Pokémon GO with an in-game event that will herald the arrival of a number of Ghost-type Pokémon originally discovered in the Hoenn region, including Sableye, Banette, and others. From October 20 at 12:00 P.M. PDT to November 2 at 1:00 P.M. PDT, players will begin to see these mysterious Pokémon from the Hoenn region out in the wild, while also encountering an increased number of spooky Pokémon such as Gastly, Cubone, Misdreavus, Houndour, and more. We hope Trainers enjoy this special Halloween treat! Look forward to arrival of the rest of the Pokémon first seen in the Pokémon Ruby and Pokémon Sapphire video games, starting gradually as early as December.
For the duration of the Halloween event, special Pikachu will also be out and about, celebrating in costume and available for Trainers to catch. Candy rewards for catching, hatching, and transferring Pokémon will be doubled throughout the event, and your buddy will find Candy twice as fast. Trainers will also have the opportunity to stock up on special boxes from the in-game shop, featuring items such as Raid Passes and Super Incubators. Finally, players will be able to wear the all-new avatar item, Mimikyu’s Disguise Hat, created in the likeness of the mysterious Disguise Pokémon Mimikyu.